selseybill Posted June 21, 2011 Posted June 21, 2011 From Denis (Selseybill)I have just posted a reply about an M7 problem, but i still have a problem of my own.My troublesome M7 since i repaired a dropped rear bogie and reassembled it has a tendency to derail on corners and in particular at a curved turnout, unless VERY slow. I have added lead weights to undercarriage which has improved traction, balance and retention to track , but it still derails very frequently, all very irritating. I have borrowed a friends M7, and his one happily negotiates my turn outs and curves even a quite high speeds, and with a load. Any one had similar M7 problems and can help, otherwise i think my Hornby M7 will be retired to the display cabinet.!! For an expensive model the M7 is NOT a great success !!
Southernman777 Posted June 21, 2011 Posted June 21, 2011 Denis,Hi, have you checked the 'back to back' distances of the wheels on your M7? Dropping it may have changed this and hence will affect the running over turnouts / points. I had a similar problem recently and correcting the wheels solved the problem. Hope this helps or at least eliminates one reason.Regards,Southernman777
selseybill Posted June 21, 2011 Author Posted June 21, 2011 Thanks Southernman.Pardon my ignorance , But, Can you just confirm what exactly the (Back to Back) distance is and how would i adjust it. I could compare with my visiting M7 which seems ok.Thanks Denis.
poliss Posted June 21, 2011 Posted June 21, 2011 Should be 14.4mm +/- 0.05 mm.See the Standards page of the Double O Gauge Society.http://www.doubleogauge.com/standards/commercialwheels.htm
6100 Posted June 21, 2011 Posted June 21, 2011 must have pressed button B to get my money back! Meant to say poliss is right on the back to back measurements. selseybill the model is a great sucess for most of us, I have 5 of them and never had any problems with them.
Postman Prat Posted June 21, 2011 Posted June 21, 2011 Hi 6100In reality the LSWR had trouble with them derailing. They were built as short distance Express locos but they derailled so often they were downgraded to SuburbanHere endeth the 1st lesson6100 said:must have pressed button B to get my money back! Meant to say poliss is right on the back to back measurements. selseybill the model is a great sucess for most of us, I have 5 of them and never had any problems with them.
6100 Posted June 21, 2011 Posted June 21, 2011 Hi pp, thank you for that extra information, dont remember seeing that anywhere. Still it doesnt affect mine!!
Postman Prat Posted June 21, 2011 Posted June 21, 2011 I'm full of totally useless information. I can't remember where I read that about the M7, I've a feeling it might have been in the Model Railway Constructor (name from the past) review of the Wills Finecast M7 kit. I've got the Constructor and Railway Modeller, every issue from early 1960, but I'm not going up into the loft to verify it!!6100 said:Hi pp, thank you for that extra information, dont remember seeing that anywhere. Still it doesnt affect mine!!
Postman Prat Posted June 21, 2011 Posted June 21, 2011 Don't count on it!!6100 said:Now that would keep you quiet for ten minutes or so!
Postman Prat Posted June 21, 2011 Posted June 21, 2011 I agree, you are the one who is having a love affair with his own voice (oh, nasty!!) I'm the one who talks rubbish6100 said:Its me that does the jaw exercises!
Postman Prat Posted June 21, 2011 Posted June 21, 2011 Your wife told me you found it difficult enough doing one thing without trying to multi task. Check e-mails.6100 said:thought I was doing both!
JKB Posted June 21, 2011 Posted June 21, 2011 Back to the subject of the derailing M7! This was happening to a friend who had replaced/repaired the rear bogie on his long M7.When placed on a flat pliece of track the loco rocked -pivoting on the rear set of driving wheels.Tried wieghts to no avail.Solution was a thin washer placed on the bogie spigot between the bogie and the locobody.Now runs perfectly.Hope this helps.
selseybill Posted June 25, 2011 Author Posted June 25, 2011 JKB said:Back to the subject of the derailing M7! This was happening to a friend who had replaced/repaired the rear bogie on his long M7.When placed on a flat pliece of track the loco rocked -pivoting on the rear set of driving wheels.Tried wieghts to no avail.Solution was a thin washer placed on the bogie spigot between the bogie and the locobody.Now runs perfectly.Hope this helps.
selseybill Posted June 25, 2011 Author Posted June 25, 2011 Hello JKB.Have tried the washer between bogie and locobody. Works great now , thanks for the tip.From.Selseybill.
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